Series reading guide · updated 2026
Hardcastle Books in Order
Every Hardcastle book in publication order — 15 in total, spanning 2004–2019.
Publication Order of Hardcastle Books
| # | Title | Year | Get it |
|---|---|---|---|
| 1 |  Hardcastle's Spy | 2004 | Amazon US UK |
| 2 |  Hardcastle's Armistice | 2005 | Amazon US UK |
| 3 |  Hardcastle's Conspiracy | 2005 | Amazon US UK |
| 4 |  Hardcastle's Airmen | 2006 | Amazon US UK |
| 5 |  Hardcastle's Actress | 2007 | Amazon US UK |
| 6 |  Hardcastle's Burglar | 2008 | Amazon US UK |
| 7 |  Hardcastle's Mandarin | 2009 | Amazon US UK |
| 8 |  Hardcastle's Soldiers | 2010 | Amazon US UK |
| 9 |  Hardcastle's Obsession | 2011 | Amazon US UK |
| 10 |  Hardcastle's Frustration | 2012 | Amazon US UK |
| 11 |  Hardcastle's Traitors | 2013 | Amazon US UK |
| 12 |  Hardcastle's Quartet | 2014 | Amazon US UK |
| 13 |  Hardcastle's Collector | 2016 | Amazon US UK |
| 14 |  Hardcastle's Runaway | 2017 | Amazon US UK |
| 15 |  Hardcastle's Quandary | 2019 | Amazon US UK |
Every title by year All 15, oldest to newest
| # | Title | Year | Get it |
|---|---|---|---|
| 1 | Hardcastle's Spy | 2004 | Amazon US UK |
| 2 | Hardcastle's Armistice | 2005 | Amazon US UK |
| 3 | Hardcastle's Conspiracy | 2005 | Amazon US UK |
| 4 | Hardcastle's Airmen | 2006 | Amazon US UK |
| 5 | Hardcastle's Actress | 2007 | Amazon US UK |
| 6 | Hardcastle's Burglar | 2008 | Amazon US UK |
| 7 | Hardcastle's Mandarin | 2009 | Amazon US UK |
| 8 | Hardcastle's Soldiers | 2010 | Amazon US UK |
| 9 | Hardcastle's Obsession | 2011 | Amazon US UK |
| 10 | Hardcastle's Frustration | 2012 | Amazon US UK |
| 11 | Hardcastle's Traitors | 2013 | Amazon US UK |
| 12 | Hardcastle's Quartet | 2014 | Amazon US UK |
| 13 | Hardcastle's Collector | 2016 | Amazon US UK |
| 14 | Hardcastle's Runaway | 2017 | Amazon US UK |
| 15 | Hardcastle's Quandary | 2019 | Amazon US UK |
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